# coding = utf-8
# Author: 柚一
import random


def generate_unique_string():
    all_chars="hgekhfkehsfekshfelaflaflkanlfnalnfalnflsfdcc0123439472932"
    # random.sample随机选取不重复的5个字符
    uniques_str="youyi"+''.join(random.sample(all_chars,5))
    return uniques_str

if __name__ == '__main__':
    print(generate_unique_string())